Improved blacking-staff for facing millstones



A. HEARTSILL.

Dressing Mil lstones.

' No. 87,669. Patented March 9, 1869.

WWW/asses 1 Inventor:

N. PETERS. Fhotohlhagmpher, Wanhinglon. D. C.

UNITED STATES PATENT OFFICE.

ABBAM HEABTSILL, OF LOUISVILLE, TENNESSEE.

'IMPROVED BLACKlNG-STAFF FOR FACING MlLLSTONES.

Specification forming part of Letters Patent'No. 87,669, dated March 9, 1869.

To all whom it may concern: spindle B passes,-.are to regulate the stafi in Be it known that I, ABRAM HEAR-TSILL, of line with-the face of the stone.

Louisville, in the county of Blount, and 1n The runner or' top stone is to have a block the State of Tennessee, have invented certain fitted into the eye, in which block is erected new and useful Improvementsin Blackinga spindle, (corresponding to the spindle in the Staffs for Facing Millstones; and I do hereby bed-stone,) upon which a stafi exactly similar declare that the following is a full, clear, and to the staff G is to be used in the same manexact description thereof,reference being bad ner, and the surface of the staff for the runto the accompanying drawing, and to the letner is to be fitted perfectly to the surface of ters of reference marked thereon. the stafi on the bed-stone, thus securing a per- The nature of my invention consists in the feet uniformity of the stones all around when construction and arrangement of a blackingin motion.

staff for facing millstones, which is to be used It does not matter whether the staffs. are

preparatory to dressing them. perfectly true or otherwise, only so they are In order to enable others skilled in the art matched one to the other. The stafis being exto which my invention appertains to. make actly alike,1 have not deemed it necessary to and use the same, I will now proceed to derepresent one for the runner-stone.

scribe its construction and operatiou,referring Having thus fully described my invention,

to the annexed drawing, which, forms a part what I claim as new, and desire to secure by of this specification, and which represents a Letters Patent, is-- side elevation of my invention. The combination 'of the staff 0, frame D, A'Irepresents .the bed or stationary stone thumb-screw E, nave G, and thumb-screws F with thespindleB belonging thereto. 0 is the F, all constructed and arranged substantially blacking-stafl', which is attached to a frame, D. as and for the purposes set forth.

The thumb-screw E in the center of the top In'testimony that I claim the foregoing I of the frame D rests on the top of the spindle have hereunto set my hand and seal this 14th B, and regulates the 'blacking-staff, so as to day of J anuary, 1869.

let the staff touch only the highest points on ABRAM HEARTSILL. IL. s. l the stone, which is to be repeated until the Witnesses: surface is perfectly regular. Thethreethumb- J. G. M. BUGLE,

screwsF Fin the nave G, through which the W. A. WALKER. 

